Relaying Quantum Information

Ilin, Yigal; Pereg, Uzi

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https://hdl.handle.net/2142/130291 Copy

Description

Title

Relaying Quantum Information

Author(s)

• Ilin, Yigal
• Pereg, Uzi

Issue Date

2025-09-17

Keyword(s)

• Quantum capacity
• Quantum relay channels
• Quantum repeaters
• Entanglement-assisted communication

Abstract

Quantum relays are central to both quantum communication and distributed quantum computing, enabling long-distance transmission and modular architectures. Unlike classical repeaters, quantum repeaters preserve coherence without amplifying quantum information, relying on entanglement swapping and quantum error correction to overcome loss and decoherence. In this work, we investigate the transmission of quantum information via quantum relay channels. Our three-terminal relay model captures the trade-off between repeater-assisted and repeaterless communication strategies. We propose a decode-forward coding scheme and analyze both entanglement-assisted and unassisted scenarios. Our framework allows for different entanglement topologies between the transmitter, the relay and the destination receiver, recovering known results on entanglement-assisted and unassisted communication. Furthermore, we discuss the interpretation of coding with quantum side information. These findings serve as a stepping stone for the design of secure, efficient, and reliable quantum networks and the practical realization of quantum repeaters and long-range quantum key distribution.

Publisher

Allerton Conference on Communication, Control, and Computing

Series/Report Name or Number

2025 61st Allerton Conference on Communication, Control, and Computing Proceedings

ISSN

2836-4503

Type of Resource

Text

Genre of Resource

Conference Paper/Presentation

Language

eng

Handle URL

https://hdl.handle.net/2142/130291&&

Copyright and License Information

Copyright 2025 is held by Yigal Ilin and Uzi Pereg.

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